tek9step,

as you can probably see in the Excel timeline template file, there are several columns, i.e.

Year Event [42] Height Axis Label

Your own file only has three columns, i.e.

day - Date - Task Completed

So, you obviously lack data to build the chart as described in the vertex42 article. It's really all explained in the article, so why don't you have a proper, slow read and follow the instructions there, instead of me re-typing it all?

If you have a question about a specific aspect, please come back, but do try and do the leg work first.

cheers